'Fortnite' Season 5 Week 6 Challenge: How to Signal All the Coral Buddies Another day, another brand-new challenge in "Fortnite" from Epic Games. This time, as we're six weeks deep into Season 5, Epic rolled out a new challenge that requires you to "signal the Coral Buddies." However, it's also worth noting that you need to complete several challenges before unlocking this one. After blowing up fishing holes at Sharky Shell, Sweaty Sands, or Flopper Pond from Turk, you will be able to head over to Coral Castle and do the challenge in "Fortnite." How to signal the Coral Buddies? What do I get after I successfully manage to do so? Is there any other challenge in "Fortnite" coming up? All the answers you need are here!